The research of control strategy for Household Micro Power Grid inverter

The research object is the Single-phase photovoltaic (pv) grid inverter based on the household, and adopt the DC/DC/AC two level conversion circuit topology. This paper studies the maximum power point tracking of photovoltaic power generation units and booster function for the Former level conversion circuit, and studies the DC bus voltage stability and interconnection of the same frequency and phase current with the main grid for the DC/AC inverter circuit. The Maximum power point tracking control strategy uses the improved perturbation method of observation, and the inverter circuit control strategy with the improved PID control technology. The feasibility of the control scheme is verified by the simulation, the simulation results show that the grid inverter working performance is stable and reliable, and the control system meets the design requirements.